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Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information and Procedures >> DTC B1579 >> Circuit/System Description

Circuit/System Description

For an overview of the component/system, refer to Interior Lighting Systems Description and Operation

Circuit Description
Control High Control
Low Reference Grounded through the control module.
Component Description
B70 Liftgate Close Switch Illumination lamps are used as backlight for switches or panel areas.
K194 Rear Gate Module The control module K194 controls the liftgate motor function depending on inputs from a variety of sensors, switches and serial data information from other control modules.
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